Wood-trimming machine.



N0. 873,837. PATENTED DEC. 17, 1907.

C. E. BROWN 6: W. J. GIBBS. WOOD TRIMMING MACHINE.

APPLIUATION FILED APE.18,1907.

3 SHEETSSHEET 1.

34577. .ZU WITNESSES N VENTORJ n4: NORRIS VETERS co, WASHINGTON, n. c

No. 873,837. PATENTED DEC. 17, 1907. C. E. BROWN & W. J. GIBBS. WOUDTRIMMING MACHINE.

APPLIOATION FILED APR. 18,1907.

3 SHEETSSHERT 2.

WITNESSES: fill WW- L/m. W.

IN V EN TORJ V A! [URN/1Y7 THE zvomus PETERS cm. WASHINGTON, b c.

No. 873,837. PATENTED DEC 17, 1907, 0. E. BROWN & W. J. GIBBS. WOODTRIMMING'MAGHINE.

APPLICATION FILED APB. 18,1907.

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WITNESSES WK Z fJ/EW v IN V ENTOR lV-J 6/1765 Cf. Brown MW A TTORNE-Y.

n-n: NORRIS PETERS cu, WASHINGTON, n. c.

UNITED STATES PATENT OFFICE.

CLAUDE E. BROWN AND WILLIAM J. GIBBS, OF DENVER, COLORADO.

WOOD-TRIMMING MACHINE.

Specification of Letters Patent.

Fatented Dec. i-';, 1907.

To all whom it may concern:

Be it known that we, CLAUDE E. BROWN and WVILLIAM J. GIBBS, citizens ofDenver, in the county of Denver and State of Colorado, have inventedcertain new and useful Improvements in WVood-Trimming Machines, of whichthe following is a specification.

Our invention relates to certain new and useful improvements in woodtrimming machines and more particularly in' the class of machinescomprising one or more knives which have a reciprocating movement inrelation to a bed upon which the stock to be trimmed is disposed.

The objects of our invention are to provide a machine of the class namedwhich combines simplicity of construction with great power andefficiency in action, which may be employed to cut the stock disposedupon its bed, at any desired-angle in relation to its altitudinalsurfaces as well as to its upper or lower surfaces, which has adequatemeans to readily and accurately adjust the stock to the desired anglerelative to the plane of travel of the knives, which may be used to cutstock of large dimensions, and in which the arrange ment of the knivesobviates the use of guides to prevent splitting of the wood While beingdriven therethrough.

We attain our objects by the mechanism illustrated in the accompanyingdrawings in the various views of which like parts are similarlydesignated and in which Figure lrepresents a plan view of our improvedmachine, Fig. 2-.a front elevation thereof, Fig. 3-a side elevationdrawn to an enlarged scale, Fig. 4an enlarged, central, vertical,transverse section through the device, the bed and sliding table havingbeen shown in three positions, Fig. 5a fragmentary transverse section ofthe lower part of the machine looking in the direction of the segmentalbed gage, Fig. 6a section taken along a line 66, Fig. 5, Fig. 7anunderneath view of the slidable table, Fig. S-a

plan view of the table illustrating a modified arrangement of the anglegages, Fig. 9a fragmentary side elevation of the lower part of themachine, drawn to a reduced scale, showing a modifiedmanne'r ofsupporting the bed upon the stationary frame, and Fig. 10 a vertical,sectional view taken along a line 1010, Fig. 9.

Referring to the drawings the reference character 5 indicates thestationary frame, composed of two vertical standards or uprights'6 andthe connecting U-shaped plate 7 the lower portion of Which is reinforcedby a laterally extending rib 8.

The standards 6, whose lower, bifurcated extremities 9 terminate inoutwardly ranging feet 10, are provided at their opposite, inner faceswith vertical channels 11 which form guide ways for the reciprocatingknife frame 12.

The connecting plate 7 and the knife frame 12 are respectively providedwith integral, oppositely positioned racks 13 and 14 into which meshesthe interposed pinion. 15, formed at its rear face with a dove-tailedchannel 16 for the reception of the correspondingly shaped extremity ofan operating handle or lever 17. The pitch line of the rack 14 lies in aplane with the vertical axis of the knife carrier so that the powerapplied through instrumentality of the pinion, is evenly distributed andequability and ease of motion of the reciprocating parts are assured.

Secured upon the outer face of the frame 12 intermediate the standards,are'the angularly arranged knives 18, the cutting edges 19 of whichcompose an upwardly pointing angle, the apex of which lies in thevertical center line of the carrier. It should be observed that,although for ease in manufacture it is desirable to employ two knives,the cutting edges may be formed upon a single V-shaped plate.

The reference numeral 59 designates the bed employed to support thestock in proper relation to the knives and which is pivotally connectedwith the standards 9 by means of pivot bolts 20 disposed in registeringapertures in lugs 21 and 22 which project in contiguous relationrespectively from the standards and the bed plate. The inner or shearingedge 23 of the latter extends in close proximity to the surface of theknives 18 and in alinement with the axes of the two pivots 20 of the bedso that the distance between the said edge and the knives will beuniform irrespective of the position of the bed plate in relation to thestationary frame. The bed 59 is furthermore provided at one of itssides, with a downwardly ranging slotted, segmental gage 24, the arc ofwhich is described from a center point lying in the pivotal axis of thebed and which has upon its outer face, a series of graduations which byregistration with a fixed point 25 upon the leg 9 of the standard 6, inadjacency to which the segment extends, aids in determining in degrees,the angle between the bed late and the vertical plane of travel of thenives.

The gage 24 and the therewith connected The gage 38 is provided withsuitable indicatory means such as a V shaped notch 53 which byregistration with the graduations of the scale 43 denotes the angle tobed plate may be retained in any desireda l h the gage is adjusted.

position by the use of a thumb screw 26, which extending through theslot 27 in the former, projects into a cooperatively thread; ed aperturein the adjacent leg of the standard. The adjustment of the bed plate tothe desired angles is greatly facilitated by the employment of a pin 28,which projecting through a corresponding opening 29 in the leg 9, isarranged to enter any one of a plurality of indentations 33 arranged onthe inner surface of the segment, in relation to the graduations uponits opposite face. The pin 28 is held resiliently in engagement with thesegmental arm by means of a spring 29, disposed in an enlarged part ofthe open ing 29 in engagement with a collar 30 upon the pin and a cap 31employed to close the opening. A head 32 facilitates the withdrawal ofthe bolt from the indentations, 33, which are preferably made oblong inshape in order to allow for a slight adjustment of the bed plate afterit has been placed at the desired angle to the knives.

Slidably mounted upon the upper surface ofithe bed plate is a table 34provided upon its lower surface, with two parallel longi tudinal ribs 35and 35 the outer one 35 of which is seated within a correspondinglyformed guide groove 36, while the other 35 extending along the inneredge of the table, engages an offset 37 on the bed.

A gage 38 is pivotally mounted upon the sliding table in centralrelation thereto, by means of a pivot pin 39 which projects into acorresponding opening 40 in proximity to the inner edge of the table.The gage may be retained in any of a plurality of predeterminedpositions, by means of a bolt 41 which occupies a vertical bore 42 inits outer portion and whose lower extremity projects through an arcualslot 43 in the table, described from a center lying in the pivotal axisof the gage. The table is furthermore provided upcn its upper surface,with a graduated scale 43 concentric to the guide slot 43, and upon itslower surface with a ridge 44, which bounding the slot 43, has aplurality of notches 45, the center lines of which extend respectivelyin planes with the radii of the graduations on the above mentionedscale. Lateral projections 46 on the lower extremity of the bolt 41, areadapted to occupy the notches 45 and a nut 47 upon its upper threadedextremity, in engagement with the upper edge of the gage, retains thesaid projections in their adjusted position. A thumb piece 48 applied tothe end of the bolt projecting above the nut 47, facilitates theadjustment of the projections 46 in the notches 45.

The sliding table may, if so desired, be provided with two gages insteadof the above de scribed central one, as is illustrated in Fig. 8 of thedrawings, in which the reference character 49 designates the gagespivoted. at 50 near the side edges of the table, and 51 the bolts at theouter ends of the gages which project through slots 52 in the table.

Figs. 9 and 10 represent a manner of supporting the bed of the device,different from that hereinbefore described and particularly adapted foruse on large and heavy machines. The lugs 21 and 22 and the cap screws20 are in this case omitted and the bed 59 provided with two rearwardlyranging, segmental arms line with the shearing edge 23. The arms 54occupy correspondingly shaped segmental seats 55 produced by flanges 56on the standards 6 and the bed is held in its adjusted po sition throughinstrumentality of the slotted segmental gage 24 which in this case isconcentric to the arms 54 and the seats 55.

ily understood in connection with the fore going description.

The piece of stock having been placed upon the table 34, the latter ismoved upon the supporting bed 59 until the portion of the stock which isto be cut occupies a position substantially opposite the apex 57 of thecutting edges 19 of the knives. If it is desired to cut the wood at agiven angle to its upper or lower surface, the bed 59 is adjusted bymeans of the graduated segmental gage 24 to form a similar angle withthe vertical plane, which adjustment is greatly facilitated and readilyand accurately accomplished by the use of the spring dog 28 arranged toproject into the indentations 33 of the gage. Should it be desired tocut the piece of stock along a plane at a certain angle to itsaltitudinal faces, its position is adjusted to the desired angle, byplacing it against the pivotal gage 38 and positioning the latter sothat its indicatory notch 53 registers with the proper graduation on thescale 43 which, as hereinbefore described, may be speedily accomplishedby adjustment of the bolt 41 in respect to the notches in the ridges 44.

It is obvious that the machine may be employed to cut the woodsynchronously at angles to its lower and to its altitudinal surfaces bysimultaneous adjustment of the position of the bed and of the gage 38.

The carriage 12 having been raised, the end of the adjusted piece ofstock is projected in the path of the cutting edges 19 and the knivesdriven downwardly by manipulation of the operating lever 17. The forcewith The operation of the machine will be read 54, the centers of thearcs of which lie in a I which the knife carriage descends is augmentedby its weight while the central position of its rack prevents binding ofits edges in the vertical guide ways and assures even distribution ofthe applied force over the cutting edges of the knives, The simultaneousengagement of the latter with the stock not only facilitates the cuttingprocess, but furthermore tends to firmly retain the piece in itsadjusted position and to prevent splitting of the wood.

An additional advantage of-the arrangement of the parts of our machineconsists in the fact that the racks and pinion are at all times abovethe cutting edges of the knives so that chips and shavings can notinterfere with their operation.

Having thus described our invention what we claim and desire to secureby Letters Patent is z- 1. In a wood trimming machine the combination ofa plane, vertically reciprocating member having cutting edges extendingfrom its vertical edges upwardly to a central point of intersection anda bed having a shearing edge in cooperative proximity to the said memberand movable about a horizontal axis, means connected with the bed tomeasure in angular magnitudes the angle between its upper surface andthe face of the cutting member, and means to retain the bed in itsadjusted position.

2. In a wood trimming machine, in combination, a vertlcallyreciprocating, plane knife having two cutting edges extending from itsvertical edges upwardly to a central point of intersection, a bed havinga shearing edge in cooperative proximity to the said knife and movableabout a horizontal axis, a table upon the said bed movable in parallelrelation to the knife, a gage upon the said table movable about an axisat right angles to its upper surface, and means to hold the said gage inits adjusted position.

3. In a wood trimming machine, in c0mbination a verticallyreciprocating, plane knife having two cutting edges extending from itsvertical edges upwardly to a central point of intersection, a bed havinga shearing edge in cooperative proximity to the said knife and movableabout a horizontal axis, a table upon the said bed movable in parallelrelation to the knife, means connected with the bed to measure the anglebetween its upper surface and the face of the knife, a gage upon thetable movable about an axis at right angles to its upper surface, andmeans upon the table to measure the angle between the said gage and aplane passing through its pivotal axis.

In testimony whereof we have affixed our signatures in presence of twowitnesses.

CLAUDE E.BROWN. WILLIAM J. GIBBS.

Witnesses:

G. J. ROLLANDET, K. M. STUMP.

